Abstract

External environment factors affecting structure deformation such as pressure, load, and stress may cause ground collapse, and such hazard may induce a loss of human life. To detect the environmental changes, most of the safety inspection in tunnels has been performed by manual measurement with non-regular inspectors. Thus, regular monitoring of displacement data cannot be performed, which would lead to diverse problems such as inaccurate measurement of structure deformation, inspection cost increase by frequent inspections, and inspector accidents. Due to the problems mentioned earlier, it is very difficult to estimate hazardous situations with high accuracy. To address the problems, a strain gauge sensor has been employed for real-time measurement. However, the strain gauge sensor has limitations to produce displacement data. Thus, in this paper, we propose a new tunnel displacement measurement system using a tilt meter sensor. In our experiments, we tested our system in a modeled tunnel for approving system validity.
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